Licensee is described as 'Detect what license a project is distributed under'. There are nine alternatives to Licensee for Linux, Windows, Mac and Online / Web-based. The best alternative is FOSSA, which is free. Other great apps like Licensee are ScanCode (Free, Open Source), Ninka (Free, Open Source), FOSSology (Free, Open Source) and Slic (Free, Open Source).
Ninka is a lightweight license identification tool for source code. It is sentence-based, and provides a simple way to identify open source licenses in a source code file. It is capable of identifying several dozen different licenses (and their variations).
FOSSology is an open source license compliance software system and toolkit. As a toolkit you can run license, copyright and export control scans from the command line. As a system, a database and web ui are provided to give you a compliance workflow.